Standard Test Method for D-C Resistance or Conductance of Moderately Conductive Materials

Importancia y uso:

5.1 This test method is useful for the comparison of materials, as a quality control test, and for specification purposes.

5.2 This test method is useful in the selection and use of materials in wires, cables, bushings, high-voltage rotating machinery, and other electrical apparatus in which shielding or the distribution of voltage stress is of value.

5.3 Commercially available “moderately conductive” materials frequently are comprised of both conductive and resistive components (that is, cellulose fibers with colloidal carbon black particles attached to portions of the surfaces of those fibers, or discrete conductive particles adhered to the surfaces of electrical insulating polymers). Such commercially available materials are often manufactured in a manner that results in anisotropy of electrical conduction. Hence, the significance of tests using this test method depends upon the orientation of the specimen tested to the direction of the electric field and the relationship between this orientation and the orientation of the material in the electrical apparatus, which uses these materials.

Subcomité:

D09.12

Referida por:

D6095-12R23, D1711-24A, D0257-14R21E01, D4325-20, F3510-21, D3004-08R20, D8231-24, D0257-14R21E01

Volúmen:

10.02

Número ICS:

29.050 (Superconductivity and conducting materials)

Palabras clave:

electrical shielding; moderately conductive; semicom; surface resistivity; volume resistivity;